The two most important factors that appear to have been involved in past mass extinctions are:
A) fire and climatic factors.
B) disease and parasites.
C) glaciers and earthquakes.
D) environmental and biological factors.
E) plate tectonics and climatic factors.

Question

Quizplus · Accepted Answer

Environmental and biological factors are the two most important factors that appear to have been involved in past mass extinctions.

The Two Most Important Factors That Appear to Have Been